33399328 has 48 divisors (see below), whose sum is σ = 68584320. Its totient is φ = 15997696.

The previous prime is 33399319. The next prime is 33399341. The reversal of 33399328 is 82399333.

It is a super-2 number, since 2×33399328² = 2231030221703168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79503 + ... + 79921.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^33399328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33399328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292160).

33399328 is an abundant number, since it is smaller than the sum of its proper divisors (35184992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33399328 is a wasteful number, since it uses less digits than its factorization.

33399328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 521 counting only the distinct ones).

The product of its digits is 104976, while the sum is 40.

The square root of 33399328 is about 5779.2151716301. The cubic root of 33399328 is about 322.0420453565.

The spelling of 33399328 in words is "thirty-three million, three hundred ninety-nine thousand, three hundred twenty-eight".